RewriteEngine On
RewriteRule ^(.+)_list_(\d+)_p_(\d+).html$ $1_list.php?classid=$2&page=$3
RewriteRule ^(.+)_list_p_(\d+).html$ $1_list.php?page=$2
RewriteRule ^news_(\d+).html$ news.php?id=$1
RewriteRule ^product_(\d+).html$ product.php?id=$1
RewriteRule ^(.+)_(\d+).html$ $1.php?classid=$2
RewriteRule ^(.+).html$ $1.php